Let's say you have some ideas and are going to share them on the Internet. You have a Twitter account, a blog and an ability to publish your thoughts in a magazine. You're writing three articles, all containing exactly the same information, but these articles differ in their level of detail:

The first is the shortest one, it's for Twitter. There are no details, so I'd call it a pretty brief article.

The second one is for your blog, it's several times longer.

And then the third one is pretty large, a couple of pages probably. It's well-detailed, so I'd call it a complete article.

So, the question is — what's the right word for the case 2?

Any other three words to reflect these differences also will do (these should be single words, not phrases).

I'm with @Callithumpian on this one. Something squeezed into 140 characters is not an article. It's not even a brief version or an abstract. It's just a tweet.
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RegDwigнt♦May 5 '12 at 13:56

For the latter two, abridged and unabridged come to mind. (That's the term Audible.com uses for indicating that one recording is not a full version of another.) Then I'd use tweet for the first one, as others have suggested.
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JLGMay 5 '12 at 14:34